Surname อิ่น (So 
, อิ่น) , around the world, is a widespread last name. The last name อิ่น is characteristic of Hong Kong, where it is a widespread surname, British Virgin Islands, where it is a common surname, and Cayman Islands (explore the name in all countries). Measured by absolute frequency, it is commonest in Hong Kong, Egypt, and China. Likewise, อิ่น is the forename as well as the last name.